We have designed KC868-E8T with Tuya module , 4G LTE module and ESP32, the 8 channel removable relay board.
You can integrate KC868-E8T to home assistant by ESPHome use follow resource:
a. 8 relay relay, 8 channel digital input for switch panel. 4 channel AC220V energy meter (BL0939 energy chip) for load’s voltage, current, power, power consumption. DS18B20 temperature sensor.
b. support use Tuya mobile phone application remote control 8 relay by internet , monitor 4 channel load’s energy meter and temperature by DS18B20 sensor.
c. support use SIM card send SMS to control 8 channel relay.
d. support use 433MHz wireless RF remoter to learn code and control 8 channel relay.
KC868-E8T also is open source. you can download schematic diagram from KinCony’s webpage and ardunio IDE demo source code for this board use by Tuya IoT platform.
Related technical information
ESP32 and Tuya I/O pin define: https://www.kincony.com/forum/showthread.php?tid=2359
config yaml file for ESPHome: https://www.kincony.com/forum/showthread.php?tid=2360
4G module SMS command list: https://www.kincony.com/forum/showthread.php?tid=2361